The Adventure of a Lifetime

The Doctor had lost the Ponds, and he has been traveling all on his own ever since. But he is bored out of his mind with absolutely nothing going on. No Dalek invasions, no Weeping Angels coming after him, and so on. Suddenly, he gets a mysterious message on his psychic paper from someone named Loki, and he says that he needs The Doctor's help. Once The Doctor arrives on Asgard, he realizes that Loki tricked him into coming there. He has been locked away in a room for days, and he too is bored out of his mind. He attempts to convince The Doctor to take him on an adventure, and he finally gives in, taking Loki with him. But will he regret it? What will he come across? Will either of them be put in any danger?